For battery cells, review the product description for real-world current recommendations, testing notes, and application guidance. Manufacturer maximum ratings should be treated as limits, not the best target for long-term pack health.
Description
Smart Cell 8-Channel Tester/Charger
Test and compare up to eight cylindrical lithium-ion cells with independently operating channels. The tester displays channel status, voltage, current, measured internal resistance, and charge/discharge curves on its 2.4-inch color screen.
Important: accessories are sold separately
This listing does not include a power supply or additional 21700 holder/tray assemblies.
- Power supply: A compatible external DC 5V, 10A power supply is required and sold separately.
- 21700 cells: Compatible 21700 holder/tray assemblies are required for 21700 testing and sold separately.
Shop the compatible 4-slot 18650/21700 tester holder assembly
What is included
- 1 × Smart Cell 8-channel tester/charger main unit
Cells, external power supply, and additional 21700 holder/tray assemblies are not included.
Key capabilities
- Eight independently operating test channels
- Charge, discharge, automatic cycle, and activation modes
- Eight-channel status preview plus single-channel curve display
- Active fan cooling and overheating protection
- Reverse battery and reverse power connection protection
- External discharge testing through the 2P terminal
Specifications
| Feature / Specification | Details |
|---|---|
| Product Name | 8-Channel 21700/18650 Lithium Battery Auto Charge/Discharge Tester |
| Screen | 2.4-inch color display |
| Supported Cells | 18650 and 21700 lithium-ion; 21700 holder/tray assemblies sold separately |
| Channels | 8 independent channels |
| Charging Current | Maximum 1A per channel; not adjustable |
| Discharge Current | Maximum 1A per channel; non-constant and not adjustable |
| Charging Stop Voltage | 3.7V, 3.8V, 3.9V, 4.0V, 4.1V, or 4.2V |
| Recharge Stop Voltage | Adjustable from 3.0V to 4.2V in 13 steps |
| Discharge Stop Voltage | Adjustable from 2.0V to 3.6V in 17 steps |
| End Current | Adjustable: 100mA, 200mA, or 300mA |
| Internal Resistance Measurement | DC two-wire method |
| Heat Dissipation | Active fan cooling |
| Overheating Protection | Supported |
| Automatic Cycle | One charge-discharge-charge cycle |
| Modes | Automatic, charging, discharge, and activation; activation mode requires manual stop |
| Standing Time | Adjustable from 1 to 5 minutes |
| Status Preview | Eight-channel status preview on one screen |
| Curve Display | Single-channel voltage/current and charge/discharge curve display |
| Reverse Connection Protection | Reverse battery and reverse power connection protection |
| External Discharge Test | Supported through the 2P terminal; the battery holder and external test cannot be used simultaneously |
| Required Power | External DC 5V, 10A power supply; sold separately |
| Power Interface | DC 5.5 high-current interface and 5V positive/negative connection points |
| Product Dimensions | 37 × 110 × 310mm |
| Package Dimensions | 60 × 112 × 335mm |
Lithium-ion testing safety
Inspect every cell before testing. Do not use damaged, dented, leaking, corroded, or overheated cells. Operate the tester on a nonflammable surface in a monitored area, and keep all charge, discharge, and cutoff settings within the cell manufacturer's published limits.
Orders ship from Florida when inventory is available. Lithium-ion cells require proper handling, protected packs, correct chargers, and safe storage. Do not solder directly to battery terminals.
Payment and Security
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G
This charger works well once you figure out the menu. The one real downside is the fan noise so I replaced the fans with Noctua NF-A4x10 5V fans whick are 1/10 the noise level of the cheap fans that come with the charger. It was a pleasure to work with DIY500AMP.com. The product was packaged well and shipping was quick from Florida. I will definetly be buying more from this company.
'Thank you for your review! We are glad to hear that you are enjoying our Smart Cell 8-Channel Tester/Charger for 18650/21700. We apologize for the fan noise and are happy to hear that you were able to find a solution. We appreciate your business and hope to serve you again in the future. Thank you for choosing DIY500AMP.com!'
B
Great product, time saving when batch processing a lot of cells. Does 18650 & 21700 cells. Charge and discharge 1a per bay. I’ve used on a few hundred cells so far with no issues at all. Would recommend.
As always, diy500amp has the best customer service and fastest shipping anywhere!
Thanks, Brad! We're glad the tester is saving you time and handling large batches smoothly. It's a reliable tool for 18650 & 21700 cells, and we're happy it's working great for your workflow. Appreciate your continued support!
B
First model to purchase. Definitely could use a basic instruction set or include a QR code for a video link. It works great. Could use a better method for battery removal. Prying against the plastic will cause failure.
Thanks for the feedback, Bryan! We're glad to hear the tester works well for you. You're absolutely right a simple instruction sheet or video guide would be a big help. We're already working on that, and we appreciate the tip on improving the removal process too!
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Everything is great 100%recommended fast and professional
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Wow, these cells are great!
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